Corporations have their first amendment rights curtailed along various axes (or, depending on your political philosophy, they aren't people so they don't have f

Corporations have their first amendment rights curtailed along various axes (or, depending on your political philosophy, they aren't people so they don't have first Amendment rights and any first Amendment-esque writes they enjoy are a convenience fabrication the US legal system put together so they didn't have to go through every law that applies to people and decide whether it applies to corporations). But as example, without modification to the first Amendment, the Civil Rights Act broadly curtailed the freedom of association of employers and public establishments. Similar law exists for anti-union activity already.